Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 11
    Electronic Resource
    Electronic Resource
    An experimental study on a wake behind a torus using the UVP monitor (1999)
    Springer
    Experiments in fluids 26 (1999), S. 197-207 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The flow around a torus has a complicated three-dimensional structure. Measuring the spatiotemporal field of velocity by means of conventional methods such as hot-wire anemometers and other one-point measuring instruments is thus difficult. Research is made on the spatiotemporal structure of the wake behind the torus by using a flow-visualizing technique and an ultrasonic velocity profile (UVP) monitor, in which two kinds of tori with different diameter ratios or solidity are set in a uniform flow with zero inclination and oblique postures. For the torus with zero inclination, there are two modes of flow structure according to the diameter ratio; at lower ratio, a disk mode is dominant, and at higher ratio, a ring wake mode appears. For the torus set with an oblique posture, the structure of the wake changes with respect to the oblique angle in a complicated fashion. The power spectra of the fluctuating velocities reveal an aspect of the character of this structural change. The Strouhal numbers estimated from the power spectra suggest that the flow patterns can be classified into four categories with respect to the oblique angle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003480050280
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    Tam3 in Antirrhinum majus is exceptional transposon in resistant to alteration by abortive gap repair: identification of nested transposons (1998)
    Springer
    Molecular genetics and genomics 259 (1998), S. 468-474 
    Details
    ISSN: 1617-4623
    Keywords: Key words Abortive gap repair ; Antirrhinum majus ; Nested transposons ; Structural conservation ; Tam3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Most transposon families consist of heterogeneous copies with varying sizes. In contrast, the Tam3 copies in Antirrhinum majus are known to have exceptionally conserved structures of uniform size. Gap repair has been reported to be involved in the structural alteration of copies from several transposon families. In this study, we have asked whether or not gap repair has affected Tam3 copies. Five Tam3 copies carrying aberrant sequences were selected from 40 independent Tam3 clones and their sequences were analyzed. Two of the five copies contain insertions in the Tam3 sequence. These two insertions, designated Tam356 and Tam661, are typical transposon-like sequences, which have terminal inverted repeats and cause target site duplication. These nested transposons were obviously associated with transpositional events, and did not originate from the gap-repair process. The remaining three copies had lost large parts of the Tam3 sequence. We could not find any relationship between the deletions of Tam3 sequence in the three copies and gap repair. PCR analysis of a Tam3 excision site in the nivea recurrence:Tam3 mutant also showed that most of the repair events after the Tam3 excision involved end-joining. In addition to the results obtained here, among the other clones isolated, we could not find any of the internally deleted copies that comprise a major part of other transposon families. All of these data suggest that some feature of the Tam3 structure suppresses the structural alterations that are otherwise generated during the gap repair process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380050837
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 13
    Electronic Resource
    Electronic Resource
    Two novel mutations of SURF1 in Leigh syndrome with cytochrome c oxidase deficiency (1999)
    Springer
    Human genetics 〈Berlin〉 105 (1999), S. 560-563 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Cytochrome c oxidase (COX) deficiency is the most common cause of Leigh syndrome (LS). COX consists of ten nuclear-encoded and three mtDNA-encoded structural subunits. Although the nucleotide sequences of all 13 genes are known, no mutation was found in nuclear-encoded subunit genes of COX-deficiency patients. Zhu et al. (1998) and Tiranti et al. (1998) found nine mutations in the surfeit 1 (SURF1) gene in LS families with COX deficiency. The mouse surfeit gene cluster consists of six closely spaced housekeeping genes unrelated by sequence homology. Except for the Surf3 gene, the function is still not known. The juxtaposition of at least five of the surfeit genes is conserved between birds and mammals. We identified two novel mutations of SURF1 in a Japanese LS patient with COX deficiency using direct sequencing analysis. Firstly, a 2-bp deletion at nucleotide position 790 (790delAG) in exon 8 was found, which shifts the reading frame such that the mutant protein has a completely different amino acid sequence from codon 264 to the premature stop codon at 290. Secondly, we found a T-to-G transversion at nucleotide 820, resulting in the substitution of tyrosine by aspartic acid at codon 274 (Y274D). We also studied the parents' genes, and found that the Y274D mutation was in his father and the 790delAG mutation was in his mother heterozygously. Therefore, we concluded that the patient was a compound heterozygote with these mutations. These are the first pathogenetic SURF1 mutations identified in a Japanese family.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004399900191
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 14
    Electronic Resource
    Electronic Resource
    Preparation of polyaniline-poly (p-styrenesulfonic acid) composite by post-polymerization and application as positive active material for a rechargeable lithium battery (1997)
    Springer
    Journal of applied electrochemistry 27 (1997), S. 477-481 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Polyaniline (PANI)-poly (p-styrenesulfonic acid) (PSS) composite was prepared by thermal post-polymerization of PANI-p-styrenesulfonic acid (SSA) composite. A PANI–SSA composite was prepared by mixing PANI/N-methyl-2-pyrrolidinone solution with SSA aqueous solution. The PANI–SSA composite film was prepared by casting the composite onto an ITO glass plate. The cast film was converted to PANI-PSS film by heating at 100°C for 3h (post-polymerization process). The PANI–PSS modified ITO electrode showed electrochemical responses based on the redox reaction of PANI–PSS composite in the organic electrolyte solution, for example, propylene carbonate containing 1moldm−3 LiClO4. The PANI–PSS composite was a cation -doping polymer composite. The composite was also modified on a porous carbon material (Reticulated Vitreous CarbonTM, RVC, Energy Research and Generation, Inc.). The PANI–PSS modified RVC electrode showed similar electrochemical behaviour as the PANI–PSS modified ITO electrode. Model secondary lithium cells, Li|1moldm−3 LiClO4-propylene carbonate|PANI–PSS modified RVC electrode, were constructed and charge–discharge cycling tests were carried out. The cell showed about 60% coulombic efficiency under high current density cycling conditions (3.8Ag−1, per gram of PANI–PSS modified RVC electrode).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018478007783
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...